BS EN 60068-2-65:2013
$167.15
Environmental testing – Tests. Test Fg: Vibration. Acoustically induced method
| Published By | Publication Date | Number of Pages |
| BSI | 2013 | 34 |
IEC 60068-2-65:2013 provides standard procedures and guidance for conducting acoustic tests in order to determine the ability of a specimen to withstand vibration caused by a specified sound-pressure level environment to which it is, or is liable to be, subjected. This second edition cancels and replaces the second edition, published in 1993, and constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: – minor technical and editorial changes were made throughout the document as originally requested by the DE National Committee; – following comments at the CD stage, particularly from the UK National Committee, significant technical and editorial additions were made to the standard for acoustic testing employing the progressive wave tube technique.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 6 | English CONTENTS |
| 8 | INTRODUCTION |
| 9 | 1 Scope 2 Normative references 3 Terms, definitions, symbols and abbreviations 3.1 Terms and definitions |
| 13 | 3.2 Symbols and abbreviations 4 Acoustic environments and requirements for testing 4.1 Acoustic environment for testing 4.1.1 General |
| 14 | Figures Figure 1 – Third-octave band spectrum for aeronautical applications |
| 15 | 4.1.2 Reverberant field Figure 2 – Octave band spectra for fans derived from [4] Figure 3 – Octave band spectrum for noisy industrial machineryderived from [4] |
| 16 | 4.1.3 Progressive wave field 4.1.4 Cavity resonance 4.1.5 Standing wave 4.2 Sound sources 4.3 Measuring apparatus 4.3.1 General 4.3.2 Acoustic measurements Tables Table 1 – Tolerances for acoustic measurement |
| 17 | 4.3.3 Vibration response measurements 4.3.4 Analysis of results 4.4 Requirements for testing 4.4.1 Type of facility 4.4.2 Mounting |
| 18 | 4.4.3 Specimen instrumentation |
| 19 | 4.4.4 Preparation of test control Figure 4 – Typical locations of microphone checkpoints (1 – 6) on a fictitious surface around a specimen |
| 20 | 5 Recommended severities 6 Preconditioning Table 2 – Overall sound pressure level and duration of exposure |
| 21 | 7 Initial measurements 8 Testing 8.1 Normal testing 8.2 Accelerated testing 9 Intermediate measurements 10 Recovery 11 Final measurements |
| 22 | 12 Information to be given in the relevant specification 13 Information to be given in the test report |
| 24 | Annex A (informative)Guidance for the test requirements Figure A.1 – Typical microphone arrangement around a specimen in a reverberation chamber |
| 25 | Table A.1 – Octave band/room volume relationship Table A.2 – Reverberation room, ratios of dimensions |
| 27 | Figure A.2 – Typical microphone checkpoint arrangementaround a long cylindrical specimen |
| 30 | Table A.3 – Examples of sound sources withwaveforms and typical power outputs Table A.4 – Typical OASPL and exposure durations |
| 32 | Bibliography |
